Reinforcing-frame for concrete structures.



G. M. GRAHAM.

' BEINFORGING FRAME FOR CONCRETE STRUGTURES.

urmoumn FILED Amml, 1909.

Patented Nov. 1,-1910.

- UNITED srarns PATENT OFFICE.

GEORGE M. GRAHAM, OF CHICAGO, IIQLINOIS, ASSIGNOB, MESNE ASSIGNMENTS, TO SUSPENSION STEEL CONCRETE COMPANY; A CORPORATION OF DELAWARE.

I REINFORCING-FRAME FOR CONCRETE STRUCTURES.

T 0 all whom it may concern:

Be it known that I, GEORGE M. GRAHAM, a citizen of the United States of America, and a resident of Chicago. in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Reiiiforcing-l rames for Concrete Structures, of which the following is a specification.

This invention relates to reinforced con crete structures of the type described in de tail in my prior Letters Patent No. 865.490, dated September 10, 1907, and No. SESAME), dated May 26, 1908, and has for its object. to provide a simple and economical structural arrangement and combination of parts in a skeleton reinforcing floor frame, by which the method of forming concrete floors set forth in my companion application Serial No. 491,347, filed April 21, 1909, can be carried on ina practical and economical manner; all as will hereina'l ter more fully appear.

In the accompanying drawings :----Figure l. is a plan view ot' a skeleton lloor structure showing the present improvement as applied to a. twelve unit tloor frame. the wire center being shown in a partially applied condition. Fig. 2, is,a longitudinal section on line w-w Fig. '1, illustrating the wire or rod windings forming theupper and lower skeleton centers without any tie. or connecting links. Fig. 3, is a similar view with the connecting links applied. Fig. 4-. is a detail ele 'ation of one of the connecting links Similar numerals of reference indicate. like parts in the different views.

Referring to the drawings, 1 represents the vertical posts; 2 the horizontal round beams, and 3 the coupling members by which the beams are secured togethc' and 'to the posts to constitute the supporting frame for the skeleton web or center hereinafter described. Said supporting frame comprises a multiplicity of units or panels of a uniform size and varying in mnnbcr in accordance with the horizontal area of the structure, and to this end will in addit-ion to the round border beams 2 above described, be. provided with a series of intermediate round beams t, arranged in right angle relation as shown.

5 are windings of wires arrznged m crossed relation to constitute upper and lower wire skeleton centers as set forth in Specification of Application filed April 21,

Le ter P n latented Nov. 1, i910.

1909. Serial No. 491,346.

detail in my former Patent No. 865,490, of

In the present im- September 10, 1907. provement said wire windings are continuous the entire length as well as width of the floor frame, in order to encompass the entire series of floor units above referred to. Such windings are made under ordinary tension, and the strands comprising the lower web of the skeleton center formed by said windingswill have an initial natural which is taken up and in turn assumed by the strands comprising the upper web of the skeleton center, when the concrete mass is applied thereto to form the floor proper as set forth in detail in my compan ion application Serial No. @1347, filed April 21, 1909.

\"Vith exceedingly long or wide structures, too much sag in the lower web or center is neutralized by a series of tie or connecting links (5, extending between the strands of the. upper and lower skeleton centers, and arranged imn'ualiately adjacent to the beams 2 and l, as shown. and with a view to uni- 't'ormity it is preferable to arrange said links adjacent to all of said beams, so as to form a series of sulrsags in the lower skeleton center as illustrated in Fig.3, and provide as well intermediate supports therefor to hold the mass of concrete from which the ceiling is formed.

Having thus fully described my said invention what I claim as new and desire to secure by Letters Patent, is

l. A reinforcing frame for the fioors of concrete structures, comprising a series of posts, a series of round border beams, a series of intermediate beams, couplings connecting said beams and posts together into a series-of units, and a continuous winding of wire encompassing said frame and forming a skeleton center therefor, substantially as set forth.

2. A reinforcing frame for the floor of concrete structures, comprising a series of posts, a series of round border beams, a series of intermediate beams, couplings connecting said beams and posts together into a series of units, and a. continuous winding of wire in crossed relation and encompassing said frame to form a skeleton center therefor, substantially as set forth.

3. A reinforcing frame for the floors of concrete structures, comprising a series of posts, a series of round border beams, a series of intermediate beams, couplings connecting said beams and posts together into aseries of units, a

leton center therefor, and a series of tie links connecting the upper and lower strands of said Winding together, substantially as set forth.

4. A reinforcing I said frmne I l l 1 a series of units, a continuous Winding oi wire in crossed relation and encompassing to .t'orm :1 skeleton ce'nter there; for, and a series of tie links connecting the upper and lower strands of said Winding together, substantially as set forth.

Signed at Chicago, Illinois, this 12th day of April 1909. i

GEOLGE M. GRAHAM.

*itnesses Romnrr Btnms, L. I l OLDEN. 

